package com.vic.test.jdk.test;

import java.util.HashMap;

public class testHashMap {
    public static void main(String[] args) {
        HashMap<Integer,Integer> hm = new HashMap<Integer, Integer>();

        hm.put(2,2);
        System.out.println(hm);
        hm.put(18,18);
        System.out.println(hm);
    }
}
